Dear Awesome Ben
love your work!! 
.
I have to say that I got to your amazing videos by being interested in the DIY projects.
so my first request is to have from you all data possible on your builds, and by that i mean every needed links in your youtube channel description,
like links to code sources and even your coding,
and the second request (which is why I am writing you) is to challenge you to build the cheapest 3d printer.
the original idea is to use 3 or 4 CD ROMS as the axis (X,Y,Z) and for the material to use HOT GLUE (including the "head").
for those how want ABS and... can you make a mount 3d pen.
the axis base will by also possible to have a changing purpose by changing the "head".
Best Regards.
GAL-X-E